期刊
ENVIRONMENTAL POLLUTION
卷 159, 期 2, 页码 423-430出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2010.10.026
关键词
Nitrogen; Ozone; Yield; Nutritive quality; Dehesa annual grasslands
资金
- MONTES (CONSOLIDER-INGENIO), Spain [CSD2008-00040]
- AGRISOST [S2009AGR-1630]
- Spanish Ministry of Environment, Rural and Marine Affairs
- CIEMAT
An assessment of the effects of tropospheric ozone (O-3) levels and substrate nitrogen (N) supplementation, singly and in combination, on phenology, growth and nutritive quality of Briza maxima was carried out. Two serial experiments were developed in Open-Top Chambers (OTC) using three O-3 and three N levels. Increased O-3 exposure did not affect the biomass-related parameters, but enhanced senescence, increased fiber foliar content (especially lignin concentration) and reduced plant life span; these effects were related to senescence acceleration induced by the pollutant. Added N increased plant biomass production and improved nutritive quality by decreasing foliar fiber concentration. Interestingly, the effects of N supplementation depended on meteorological conditions and plant physiological activity. N supplementation counteracted the O-3-induced senescence but did not modifiy the effects on nutritive quality. Nutritive quality and phenology should be considered in new definitions of the O-3 limits for the protection of herbaceous vegetation. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据